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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<FONT color="green">003</FONT>     * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<FONT color="green">004</FONT>     * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<FONT color="green">005</FONT>     * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<FONT color="green">006</FONT>     * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<FONT color="green">007</FONT>     * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<FONT color="green">008</FONT>     *<a name="line.8"></a>
<FONT color="green">009</FONT>     *      http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<FONT color="green">010</FONT>     *<a name="line.10"></a>
<FONT color="green">011</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<FONT color="green">012</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<FONT color="green">013</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<FONT color="green">014</FONT>     * See the License for the specific language governing permissions and<a name="line.14"></a>
<FONT color="green">015</FONT>     * limitations under the License.<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    <a name="line.17"></a>
<FONT color="green">018</FONT>    package org.apache.commons.net.telnet;<a name="line.18"></a>
<FONT color="green">019</FONT>    <a name="line.19"></a>
<FONT color="green">020</FONT>    /***<a name="line.20"></a>
<FONT color="green">021</FONT>     * Implements the telnet window size option RFC 1073.<a name="line.21"></a>
<FONT color="green">022</FONT>     * &lt;p&gt;<a name="line.22"></a>
<FONT color="green">023</FONT>     * @author Yuval Kashtan<a name="line.23"></a>
<FONT color="green">024</FONT>     * @version $Id: WindowSizeOptionHandler.java 658520 2008-05-21 01:14:11Z sebb $<a name="line.24"></a>
<FONT color="green">025</FONT>     * @since 2.0<a name="line.25"></a>
<FONT color="green">026</FONT>     ***/<a name="line.26"></a>
<FONT color="green">027</FONT>    public class WindowSizeOptionHandler extends TelnetOptionHandler<a name="line.27"></a>
<FONT color="green">028</FONT>    {<a name="line.28"></a>
<FONT color="green">029</FONT>        /***<a name="line.29"></a>
<FONT color="green">030</FONT>         * Horizontal Size<a name="line.30"></a>
<FONT color="green">031</FONT>         ***/<a name="line.31"></a>
<FONT color="green">032</FONT>        private int m_nWidth = 80;<a name="line.32"></a>
<FONT color="green">033</FONT>    <a name="line.33"></a>
<FONT color="green">034</FONT>        /***<a name="line.34"></a>
<FONT color="green">035</FONT>         * Vertical Size<a name="line.35"></a>
<FONT color="green">036</FONT>         ***/<a name="line.36"></a>
<FONT color="green">037</FONT>        private int m_nHeight = 24;<a name="line.37"></a>
<FONT color="green">038</FONT>    <a name="line.38"></a>
<FONT color="green">039</FONT>        /***<a name="line.39"></a>
<FONT color="green">040</FONT>         * Window size option<a name="line.40"></a>
<FONT color="green">041</FONT>         ***/<a name="line.41"></a>
<FONT color="green">042</FONT>        protected static final int WINDOW_SIZE = 31;<a name="line.42"></a>
<FONT color="green">043</FONT>    <a name="line.43"></a>
<FONT color="green">044</FONT>        /***<a name="line.44"></a>
<FONT color="green">045</FONT>         * Constructor for the WindowSizeOptionHandler. Allows defining desired<a name="line.45"></a>
<FONT color="green">046</FONT>         * initial setting for local/remote activation of this option and<a name="line.46"></a>
<FONT color="green">047</FONT>         * behaviour in case a local/remote activation request for this<a name="line.47"></a>
<FONT color="green">048</FONT>         * option is received.<a name="line.48"></a>
<FONT color="green">049</FONT>         * &lt;p&gt;<a name="line.49"></a>
<FONT color="green">050</FONT>         * @param nWidth - Window width.<a name="line.50"></a>
<FONT color="green">051</FONT>         * @param nHeight - Window Height<a name="line.51"></a>
<FONT color="green">052</FONT>         * @param initlocal - if set to true, a WILL is sent upon connection.<a name="line.52"></a>
<FONT color="green">053</FONT>         * @param initremote - if set to true, a DO is sent upon connection.<a name="line.53"></a>
<FONT color="green">054</FONT>         * @param acceptlocal - if set to true, any DO request is accepted.<a name="line.54"></a>
<FONT color="green">055</FONT>         * @param acceptremote - if set to true, any WILL request is accepted.<a name="line.55"></a>
<FONT color="green">056</FONT>         ***/<a name="line.56"></a>
<FONT color="green">057</FONT>        public WindowSizeOptionHandler(<a name="line.57"></a>
<FONT color="green">058</FONT>            int nWidth,<a name="line.58"></a>
<FONT color="green">059</FONT>            int nHeight,<a name="line.59"></a>
<FONT color="green">060</FONT>            boolean initlocal,<a name="line.60"></a>
<FONT color="green">061</FONT>            boolean initremote,<a name="line.61"></a>
<FONT color="green">062</FONT>            boolean acceptlocal,<a name="line.62"></a>
<FONT color="green">063</FONT>            boolean acceptremote<a name="line.63"></a>
<FONT color="green">064</FONT>        ) {<a name="line.64"></a>
<FONT color="green">065</FONT>            super (<a name="line.65"></a>
<FONT color="green">066</FONT>                TelnetOption.WINDOW_SIZE,<a name="line.66"></a>
<FONT color="green">067</FONT>                initlocal,<a name="line.67"></a>
<FONT color="green">068</FONT>                initremote,<a name="line.68"></a>
<FONT color="green">069</FONT>                acceptlocal,<a name="line.69"></a>
<FONT color="green">070</FONT>                acceptremote<a name="line.70"></a>
<FONT color="green">071</FONT>            );<a name="line.71"></a>
<FONT color="green">072</FONT>    <a name="line.72"></a>
<FONT color="green">073</FONT>            m_nWidth = nWidth;<a name="line.73"></a>
<FONT color="green">074</FONT>            m_nHeight = nHeight;<a name="line.74"></a>
<FONT color="green">075</FONT>        }<a name="line.75"></a>
<FONT color="green">076</FONT>    <a name="line.76"></a>
<FONT color="green">077</FONT>        /***<a name="line.77"></a>
<FONT color="green">078</FONT>         * Constructor for the WindowSizeOptionHandler. Initial and accept<a name="line.78"></a>
<FONT color="green">079</FONT>         * behaviour flags are set to false<a name="line.79"></a>
<FONT color="green">080</FONT>         * &lt;p&gt;<a name="line.80"></a>
<FONT color="green">081</FONT>         * @param nWidth - Window width.<a name="line.81"></a>
<FONT color="green">082</FONT>         * @param nHeight - Window Height<a name="line.82"></a>
<FONT color="green">083</FONT>         ***/<a name="line.83"></a>
<FONT color="green">084</FONT>        public WindowSizeOptionHandler(<a name="line.84"></a>
<FONT color="green">085</FONT>            int nWidth,<a name="line.85"></a>
<FONT color="green">086</FONT>            int nHeight<a name="line.86"></a>
<FONT color="green">087</FONT>        ) {<a name="line.87"></a>
<FONT color="green">088</FONT>            super (<a name="line.88"></a>
<FONT color="green">089</FONT>                TelnetOption.WINDOW_SIZE,<a name="line.89"></a>
<FONT color="green">090</FONT>                false,<a name="line.90"></a>
<FONT color="green">091</FONT>                false,<a name="line.91"></a>
<FONT color="green">092</FONT>                false,<a name="line.92"></a>
<FONT color="green">093</FONT>                false<a name="line.93"></a>
<FONT color="green">094</FONT>            );<a name="line.94"></a>
<FONT color="green">095</FONT>    <a name="line.95"></a>
<FONT color="green">096</FONT>            m_nWidth = nWidth;<a name="line.96"></a>
<FONT color="green">097</FONT>            m_nHeight = nHeight;<a name="line.97"></a>
<FONT color="green">098</FONT>        }<a name="line.98"></a>
<FONT color="green">099</FONT>    <a name="line.99"></a>
<FONT color="green">100</FONT>        /***<a name="line.100"></a>
<FONT color="green">101</FONT>         * Implements the abstract method of TelnetOptionHandler.<a name="line.101"></a>
<FONT color="green">102</FONT>         * &lt;p&gt;<a name="line.102"></a>
<FONT color="green">103</FONT>         * @param suboptionData - the sequence received, whithout IAC SB &amp; IAC SE<a name="line.103"></a>
<FONT color="green">104</FONT>         * @param suboptionLength - the length of data in suboption_data<a name="line.104"></a>
<FONT color="green">105</FONT>         * &lt;p&gt;<a name="line.105"></a>
<FONT color="green">106</FONT>         * @return terminal type information<a name="line.106"></a>
<FONT color="green">107</FONT>         ***/<a name="line.107"></a>
<FONT color="green">108</FONT>        @Override<a name="line.108"></a>
<FONT color="green">109</FONT>        public int[] answerSubnegotiation(int suboptionData[], int suboptionLength)<a name="line.109"></a>
<FONT color="green">110</FONT>        {<a name="line.110"></a>
<FONT color="green">111</FONT>            return null;<a name="line.111"></a>
<FONT color="green">112</FONT>        }<a name="line.112"></a>
<FONT color="green">113</FONT>    <a name="line.113"></a>
<FONT color="green">114</FONT>        /***<a name="line.114"></a>
<FONT color="green">115</FONT>         * Implements the abstract method of TelnetOptionHandler.<a name="line.115"></a>
<FONT color="green">116</FONT>         * This will send the client Height and Width to the server.<a name="line.116"></a>
<FONT color="green">117</FONT>         * &lt;p&gt;<a name="line.117"></a>
<FONT color="green">118</FONT>         * @return always null (no response to subnegotiation)<a name="line.118"></a>
<FONT color="green">119</FONT>         ***/<a name="line.119"></a>
<FONT color="green">120</FONT>        @Override<a name="line.120"></a>
<FONT color="green">121</FONT>        public int[] startSubnegotiationLocal()<a name="line.121"></a>
<FONT color="green">122</FONT>        {<a name="line.122"></a>
<FONT color="green">123</FONT>            int nCompoundWindowSize = m_nWidth * 0x10000 + m_nHeight;<a name="line.123"></a>
<FONT color="green">124</FONT>            int nResponseSize = 5;<a name="line.124"></a>
<FONT color="green">125</FONT>            int nIndex;<a name="line.125"></a>
<FONT color="green">126</FONT>            int nShift;<a name="line.126"></a>
<FONT color="green">127</FONT>            int nTurnedOnBits;<a name="line.127"></a>
<FONT color="green">128</FONT>    <a name="line.128"></a>
<FONT color="green">129</FONT>            if ((m_nWidth % 0x100) == 0xFF) {<a name="line.129"></a>
<FONT color="green">130</FONT>                nResponseSize += 1;<a name="line.130"></a>
<FONT color="green">131</FONT>            }<a name="line.131"></a>
<FONT color="green">132</FONT>    <a name="line.132"></a>
<FONT color="green">133</FONT>            if ((m_nWidth / 0x100) == 0xFF) {<a name="line.133"></a>
<FONT color="green">134</FONT>                nResponseSize += 1;<a name="line.134"></a>
<FONT color="green">135</FONT>            }<a name="line.135"></a>
<FONT color="green">136</FONT>    <a name="line.136"></a>
<FONT color="green">137</FONT>            if ((m_nHeight % 0x100) == 0xFF) {<a name="line.137"></a>
<FONT color="green">138</FONT>                nResponseSize += 1;<a name="line.138"></a>
<FONT color="green">139</FONT>            }<a name="line.139"></a>
<FONT color="green">140</FONT>    <a name="line.140"></a>
<FONT color="green">141</FONT>            if ((m_nHeight / 0x100) == 0xFF) {<a name="line.141"></a>
<FONT color="green">142</FONT>                nResponseSize += 1;<a name="line.142"></a>
<FONT color="green">143</FONT>            }<a name="line.143"></a>
<FONT color="green">144</FONT>    <a name="line.144"></a>
<FONT color="green">145</FONT>            //<a name="line.145"></a>
<FONT color="green">146</FONT>            // allocate response array<a name="line.146"></a>
<FONT color="green">147</FONT>            //<a name="line.147"></a>
<FONT color="green">148</FONT>            int response[] = new int[nResponseSize];<a name="line.148"></a>
<FONT color="green">149</FONT>    <a name="line.149"></a>
<FONT color="green">150</FONT>            //<a name="line.150"></a>
<FONT color="green">151</FONT>            // Build response array.<a name="line.151"></a>
<FONT color="green">152</FONT>            // ---------------------<a name="line.152"></a>
<FONT color="green">153</FONT>            // 1. put option name.<a name="line.153"></a>
<FONT color="green">154</FONT>            // 2. loop through Window size and fill the values,<a name="line.154"></a>
<FONT color="green">155</FONT>            // 3.    duplicate 'ff' if needed.<a name="line.155"></a>
<FONT color="green">156</FONT>            //<a name="line.156"></a>
<FONT color="green">157</FONT>    <a name="line.157"></a>
<FONT color="green">158</FONT>            response[0] = WINDOW_SIZE;                          // 1 //<a name="line.158"></a>
<FONT color="green">159</FONT>    <a name="line.159"></a>
<FONT color="green">160</FONT>            for (                                               // 2 //<a name="line.160"></a>
<FONT color="green">161</FONT>                nIndex=1, nShift = 24;<a name="line.161"></a>
<FONT color="green">162</FONT>                nIndex &lt; nResponseSize;<a name="line.162"></a>
<FONT color="green">163</FONT>                nIndex++, nShift -=8<a name="line.163"></a>
<FONT color="green">164</FONT>            ) {<a name="line.164"></a>
<FONT color="green">165</FONT>                nTurnedOnBits = 0xFF;<a name="line.165"></a>
<FONT color="green">166</FONT>                nTurnedOnBits &lt;&lt;= nShift;<a name="line.166"></a>
<FONT color="green">167</FONT>                response[nIndex] = (nCompoundWindowSize &amp; nTurnedOnBits) &gt;&gt;&gt; nShift;<a name="line.167"></a>
<FONT color="green">168</FONT>    <a name="line.168"></a>
<FONT color="green">169</FONT>                if (response[nIndex] == 0xff) {                 // 3 //<a name="line.169"></a>
<FONT color="green">170</FONT>                    nIndex++;<a name="line.170"></a>
<FONT color="green">171</FONT>                    response[nIndex] = 0xff;<a name="line.171"></a>
<FONT color="green">172</FONT>                }<a name="line.172"></a>
<FONT color="green">173</FONT>            }<a name="line.173"></a>
<FONT color="green">174</FONT>    <a name="line.174"></a>
<FONT color="green">175</FONT>            return response;<a name="line.175"></a>
<FONT color="green">176</FONT>        }<a name="line.176"></a>
<FONT color="green">177</FONT>    <a name="line.177"></a>
<FONT color="green">178</FONT>        /***<a name="line.178"></a>
<FONT color="green">179</FONT>         * Implements the abstract method of TelnetOptionHandler.<a name="line.179"></a>
<FONT color="green">180</FONT>         * &lt;p&gt;<a name="line.180"></a>
<FONT color="green">181</FONT>         * @return always null (no response to subnegotiation)<a name="line.181"></a>
<FONT color="green">182</FONT>         ***/<a name="line.182"></a>
<FONT color="green">183</FONT>        @Override<a name="line.183"></a>
<FONT color="green">184</FONT>        public int[] startSubnegotiationRemote()<a name="line.184"></a>
<FONT color="green">185</FONT>        {<a name="line.185"></a>
<FONT color="green">186</FONT>            return null;<a name="line.186"></a>
<FONT color="green">187</FONT>        }<a name="line.187"></a>
<FONT color="green">188</FONT>    }<a name="line.188"></a>




























































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